Wheeled plow.



W. SOBEY.

WHBELED PLOW.

APPLICATION FILED APR.23, 1909. 1, 1 1 3,501 Patented Oct. 13, 1914.

3 SHEETS-SHEET 1.

THE NoRR/S PETERS Coy, PHOTO-LITHU., WASHINGTON. D. C.

W. SOBEY.

WHEELED PLOW.

APPLICATION FILED APR. 23, 1909.

Patented Oct. 13, 1914.

3 SHEETS-SHEET 2.

faiwmm THE NORRIS PETERS 60., PHOTO-Llrfla. WASHINGTON. D. C.

. W. SOBEY.

WHEELED PLOW.

APPLICATION FILED APR. 23, 1909.

Patented Oct. 13,1914.

THE NORRIS PETERS CU" PHDKLLITHQ. WASHING TON D l."

onrrnn s'rn rns rarnn'r orrion.

WILLIAM SOBEY, OF RACINE, WISCONSIN, ASEHGNGR TO J. I. PLOW WORKS. OF

RACINE, WISCONSIN, A. CORPORATION.

VTHEELED PLOW.

1,11s,so1.

Specification of Letters Patent.

Patented Oct. 13, 1914.

To all whom it may concern Be it known that 1, WILLIAM SoBEY, a citizenof the United States, and a resident of Racine, county of Racine, andState of \Visconsin, have invented certain new and useful Improvementsin Vv heeled Plows, of which the following is a specification.

The invention relates to wheeled plows and more particularly to themeans for supporting the plow in the frame so that it may be raised andlowered, and to the mechanism for shifting the plow to and from workingposition.

The invention seeks to provide improved means for supporting the plow inthe frame and to provide simple and effective mechanism which can beoperated by the riders feet to raise and lower the plow and which isarranged to yieldingly hold the plow in working position.

The invention consists in the features of improvement hereinafter setforth, illustrated in the accompanying drawings and more particularlypointed out in the appended claims.

In the drawings, Figure 1 is a plan view of the improved plow showingthe parts in the position assumed when the plow is in the ground; Fig. 1is a detail section on the line 11 of Fig. 1; Fig. 2 is a side elevationwith the plow in working position and with parts of the frame brokenaway to show the improved lift mechanism; Fig. 3 is a view in elevationof the improved mechanism for supporting and for raising and loweringthe plow with the parts in the position assumed when the plow is in theground; Fig. 41 is a similar view with the parts in the position assumedwhen the plow is in its raised position; and Fig. 5 is a perspectiveview of the upper end of the lowering foot lever.

The drawings illustrate the improvements applied to a gang plow but itwill be understood that they are also applicable to a wheeled plow haing but a single plow bottom. The plow frame 1 is of usual constructionand is provided at its rear end with an extension 2 which carries thesleeve 3 within which the vertical spindle 1 of the rear furrow wheel 5is arranged. The front, right-hand corner of the plow frame is providedwith a sleeve 6 through which extends the vertical spindle 7 of thefront furrow wheel 8. The spindle 7 of the front furrow wheel can beshifted as usual through the sleeve 6 to level the frame of the plow, bymeans of a lever 9 that is pivoted to a forward extension 10 on thesleeve and connected to the upper end of the spindle by a link 11. Thislever is provided with the usual locking dog for engaging a segment 12fixed tothe sleeve 6. A bracket 13 to which the tongue 14' is connected,is hinged to a part 15 fixed to the upper end of the vertical spindle 7of the front furrow wheel. A slotted arm 16 on the spindle '7 isconnected to an arm 17 on the spindle d of therear furrow wheel by rod18. The riders seat 19 is secured at the upper end of a spring bar 20that is fixed at its lower end to a suitable support 21 on the frame ofthe machine. The parts thus far described may be of any suitable orusual construction.

The plow bottoms 22 are mounted upon the rear ends of suitable plowbeams 23 and 2-1. These beams are connected at their forward ends by across-bar 25 to which a clevis bar 26 is attached. At their rear ends,the plow beams 23 and 2st are connected by a diagonal brace bar 27. Theplows are hung in the machine frame by means of a bail, that isconnected to the forward ends of the plow beams, and by means of an armor semi-bail that is connected to the rear end of the plow beam The bailcomprises a shaft portion 28, crank arms 29, and a transverse portion 30extending between the ends of the crank arms. The shaft of the plow bailis journaled in suitable bearings 31 and 32 fixed to theside bars of theframe. Brackets 33, fixed to the plow beams and projecting upwardlytherefrom, are provided with bearings 3% that engage the transverseportion 30 of the bail. The arm or half bail S5 is provided with an OK-set front end journaled in theupper end of a bracket 36 that is fixed toand projects upwardly from the rear end of the plow beam 23. The rearend of the arm or half bail extends through a sleeve or. hollow T-shapcd head 37 that is fixed to the inner end of a stud 38. The stud 38is journaled as shown, in a bracket 89fixed to the adjacent side bar ofthe machine frame. Nuts 40 threaded upon the rear end of the arm 35engage the ends of the sleeve 37 and adjustably connect the arm or halfbail to the pivot or stud 38 whereon it swingsQhBy this means, theeflective length of the arm or half bail may be adjusted as desired. Thebearing 81 for the bail shaft at the land side of the machine isextended as shown, and the bail shaft 28 projects beyond this hearingand carries a sleeve ll having an arm ll-2 on its outer end. The landside wheel a3 is mounted on a short shaft A that is fixed at its innerend to the end of the arm 42. A lever a5 loosely mounted on the end ofthe bail shaft 28, is connected to the end of the arm 42 by a link rod46, and a dog +l7 on the lever is arranged to engage any one of a seriesof notches in a segment 4:8 that is fixed to the end of the bail shaft28. In this way, the land side wheel is justably ccnnezsted to the bailshaft and shifts therewith as the plow is raised and lowered toautomatically level the plow frame, the land wheel being lowered as theframe is raised. A shifter 49 for the dog -l7 is pivoted to the upperend of the lever L5 and is connected thereto by a rod 50. he link rod 48extends through a sleeve 51 at the end of the arm 42 and is providedwith a nut 52 threaded on its lower end into engagement with the sleeve.A. spring 53 extends between the sleeve and a washer 5% on the upper endof the link rod and yieldingly holds the land side wheel in position sothat it may pass over irregularities in the surface of the groundwithout unduly jarring the plow frame.

The mechanism for raising and lowering the plow is controlled throughthe medium of a short shaft journaled in a bracket that is fixed to andprojects upwardly from the side bar of the frame on the land side of themachine. A lifting foot lever 57 is connected to the outer end of thisshaft and this lever extends rearwardly toward the riders seat when theplow is in working position, as shown in Figs. 1, 2 and 3. At its rearend, it is provided with an offset foot-piece 58 upon which pressure canbe applied by the operator to lift the plow from working position. Theshaft extends through the bearing on the bracket 56 and has an arm 59fixed to its inner end adjacent the inner side of the bracket. This arm59 is fixed to the inner end of the shaft intermediate its ends and oneend portion extends forwardly from theshaft or pivot and the other endextends upwardly and rearwardly therefrom, as shown in Figs. 2 and 3,when the plow is in working position. The rear end of the arm 59 isprovided with an inwardly projecting, perforated lug 60 through whichone end of a toggle link 61 extends. A connector link 62 is pivoted tothe opposite ends of the arm 59 and toggle link 61. A second toggle link63 is pivotally connected by the offset end 64 of the connector link 62to the toggle link 61. The opposite end of the toggle link 65 ispivotally connected to a projecting lug or boss 65 upon the side of theplow beam 23, and is held against displacement by a bolt 66 extendingthrough the beam and lug and iaving a nut on its outer end engaging thehub of the toggle link 63.

The toggle link -31 is round for the greater portion of its length and anut ('37 is thread ed upon its end and engages the lug G0 on the arm 59.This nut is provided with a slotted sleeve 68 and a cotter pin 69extending through the link engages the slot of the sleeve and locks thenut in position. A. stout spring '70 is coiled about the tog le link 61and extends between the lug and a nut 70 that is threaded upon thetoggle link 61 near its pivoted end. The spring 70 holds the toggle link61 in the position shown with the nut (37 thereon engaging the lug 60 onthe arm The link (31 is movable longitudinally on the arm against thepressure of the spring. It should be noted that the toggle link (31extends across the end of the shaft 55 and is longitudinally shiftablein a line intersecting and at right angles to th axis of the shaft. Thetoggle link 63 is double (see Figs. 1 and 2) and the toggle link 61 isprovided with a flat portion '71 that extends beyond the toggle pivot Gl and is arranged to shift into position between the two parts of tnelink 63 when the plow is in the ground, as shown in Figs. 1, 2 and 3. Anadjustable stop bolt 72 is threaded through a lug on the link 63adjacent its pivot, and extends into the space between the parts of thelink 63 so as to engage a bevel. "4'3 on the end of the extension 71 ofthe toggle link 61, when the plow is in working position. This stopdevice is provided with a lock nut 74 and to arrest the movement of thetoggle links the plow is lowered to working position and to hold thelinks in line, at or near dead center position, so that the plow is heldby the toggle links in working position.

The stop bolt 7 2 can be so adjusted as to arrest the movement of thetoggle links before they reach the dead center position so that the plowcan float or rise and fall in the ground, while the toggle links swingupon their respectivev pivots. Preferably, however, the stop bolt 72 isso adjusted that the toggle links swing to position slightly beyond thedead center when the plow is lowered, as shown in Figs. 2 and 3, tothereby lock the plow in the ground. But, in this position, the plow isyieldingly held in the ground and can rise, if it meets an obstruction,since the toggle as a whole can shift longitudinally against thepressure of the spring 70 without breaking the joint be tween its links61 and 63. During this longitudinal shift or yielding movement of thetoggle in the direction of its line of centers, the arm 59 and partsconnected thereto remain substantially at rest, while the toggle link 61shifts through the lug 60 on the arm and the connector link 62oscillates on the end of the arm 59. By this arrangement, the toggleserves to lock the plow in the ground but does not hold it rigidly inthis position. If the plow strikes an obstruction, it can lift up andthe toggle will yield, without breaking the joint between its links,against the pressure of the spring 70. As soon as the obstruction ispassed, the spring will again force the plow back to its normal workingposition. By adjusting the nut 67 on the end of the toggle link 61, thetension of the spring 70 can be adjusted.

The portion. of the arm 59 adjacent the. connector link 62 is double,and a depressing or lowering foot lever '75 extends between the sectionsthereof and is pivotally connected thereto by a bolt 76. A spring 77extends between the end of the arm 59 and the foot lever and is arrangedin suitable seats or sockets in these parts as most clearl shown in Fig.4. At its inner end, the foot lever 7 5 is provided with a nose or catch78 thatis adapted to engage a segment 79 on the bracket 56 to hold theplow in the raised position shown in Fig. 4. The outer end of the footlever is provided with adaterally offset foot-piece 80 and also with asupplemental foot-piece 81 extending upwardly and rearwardly from thefoot lever and adjustably connected thereto by a bolt 82.

When the plow is in raised position, the parts of the plow-supportingand raising and lowering mechanism are in the position shown in Fig. lwith the catch 78 held by the spring 77 in engagement with the shoulderat the end of the segment 79. To lower theplow, the operator pressesupon the foot-piece 80 of the lowering foot lever 75. This first shiftlowers the foot lever about the pivot 76 against the pressure of thespring 77 and disengages the catch 7 8 from the shoulder of thesegn'ient. The foot lever 75 then engages the end of the arm 59, and thefurther movement of the foot lever, effected by pressing upon thefoot-piece 80 or the foot-piece 81, shifts the arm 59 and moves the plowinto the ground and the toggle links into the straight line positionshown in Figs. 2 and 3. so that the plow is locked in working position.The toggle, however, can yield longitudinally against the pressure ofthe spring 70. so that the plow is yieldingly and not rigidly held inposition. Or, as stated, the stop bolt 72 can be so adjusted that thetoggle links will not quite shift to their dead center position, so thatthe plow will be free to float while the toggle links oscillate upontheir pivots.

The foot-piece 81 projects upwardly as shown in Figs. 2 and 3, when theplow is in working position, and'can be conveniently used by theoperator to control the plow if the toggle is so adjusted as to permitthe plow to float. Moreover, this supplemental foot-piece enables a boyor other rider having short legs, to properly manipuing foot lever 57;this turns the shaft 55 and arm 59 thereon and the link 62 connected tothe arm breaks the joint between the toggle links 61 and 63 and raisesthe plow lrom working position. At the end of the upward movenient, thespring 77 forces thecatch 78 on thefoot lever 75 into engagement withthe shoulder on the segment 79 so that the plow is locked in raisedposition. When the plow is in the ground, the ntse or catch 7 8 ridesupon the edge of the segment 79, as shown in Figs. 1, 2 and 3.

The crank arms 29 of the plow-supporting bail, are considerably shorterthan the arm or half bail 35 and the toggle link pivoted to the plowbeam 23 at a point nearer to the bail than it is to the arm 35. By thisarrangement, a differential move ment will be given to the plow beamsand plow bottoms as they are raised and lowered, so thatthe points ofthe plows will be depressed in advance of the heels thereof in loweringthe plows from their raised posi-v tion and the plow points will belifted in advance of the heels in starting the plow from workingposition. By this means, the plows will enter and leave the ground pointirst so that the draft of the team will aid both in putting the plowsinto the ground and in lifting them therefrom. By shifting the nuts 40on the arm or half bail 35, the effective length of this arm or thedistance between its pivot point and its end that is connected to theplow can be adjusted to give the desired tip to the plow bottoms inraising and lowering the same.

Stops are provided for limiting the downward shift of the supportingbail and arm for the plows and for holding the plows in workingposition. Two of these stops are arranged upon the opposite side bars ofthe frame for engaging the crank arms 29 of the bail, and another stepis arranged in position on the side bar of the frame at-the land-side ofthe machine for engaging the arm or half bail Each of these stopscomprises a piece 83 which fits over the side bar of the frame and isprovided with lugs overlapping the edges thereof, and an L- shaped piece84L that is adjustable on the pi ee and is provided with an inwardlyextending stop lug 85 for engagement either with the crank arms of thebail or with the arms 35. The stop piece 83 and 84- are held in positionon the side bars by bolts 86 extending therethrough and through the sidebars. The parts 84 are provided with vertical slots 87 through which thebolts 86 extend, so that the stop lugs 85 may be adjusted vertically tohold the plow in the desired position when it is in the ground. A liftspring 88 is connected at its forward end to one of the crank arms 29 ofthe bail and at its rear end by an adjusting screw 89 to an upstandinglug 90 at the rear of the plow frame.

Both the lifting foot lever 57 and the supplemental foot-piece 81 on thedepressing foo-t lever 7 5 are adjustable. The laterally extendingfoot-piece 80 is formed in piece with the depressing foot lever 75. Thehub of the supplemental foot piece and the end of the foot lever 7 5 areprovided with radial interlocking teeth, as indicated at 91 in Fig. 1.The bolt 82 extends through the foot piece 80 and the hub of thefootpiece 81 and adjustably holds the latter in position upon thedepressing foot lever 75. The shaft 55 whereon the lifting foot levermounted, is hollow, as shown in Fig. 1 and is preferably formed in onepiece with the arm at its inner end. A collar 92 fits over the outer,square end of the hollow shaft 55, and this collar and the hub of thefoot lever 57 are provided with radial interlocking teeth, as indicatedat 93 in Fig. 1. A bolt 9a (see Fig. 1 extends through the hollow shaft55 and the hub of the foot lever 57. By loosening the nuts on the bolts82 and 9d, the lifting foot lever and the supplemental depressing footlever 81 can be readily adjusted to suit different operators.

When the parts are in the raised position shown in Fig. l, thesupplemental footpiece 81 can not be acted upon conveniently by therider but the foot-piece 80 is then in such position that he can readilyapply pressure thereto to trip the latch 78 and thus permit the plows todrop to the ground. The foot-piece 80 is then moved away from the ridersseat and pressure cannot as readily be applied thereto, but at thispoint, the foot-piece 81 is in such position that the operator canreadily apply pressure thereto to shift he toggle levers 61 and 63 pastthe dead center and into locked position. At the same time, the springwill be compressed but the operator need give the matter no moreattention, since the spring 70 will complete the work of forcing theplows to their full depth as the team advances. It will thus be notedthat the foot-piece is in convenient position when the plow is raised totrig the latch 78, and the foot-piece 81 is in convenient position whenthe greatest pressure must be applied to the foot mechanism.Thefoot-piece 81 is farther from the axis about which the lift mechanism turns than the foot-piece 80, and thus has greater leverage andenables the operator to compress the spring 70 and lock the toggle pastits center.

It should be noted that the improved raising and lowering togglemechanism for the plow acts to positively shift the plow to and fromworking position, but yiel'dingly holds the plow in working positionwithout breaking the toggle joint. It should also be noted that, in thepreferred construction illustrated he landside wheel is shifted with thebail as the plow is raised and lowered to thereby automatically levelthe frame.

lit is obvious that numerous changes can be made in the details setforth without departure from the essentials of the invention as definedin the claims.

I claim as my invention 1. In a wheeled plow, the combination with theframe and the plow hung thereon to shift to and from working position,of a swinging arm on said frame a toggle interposed between said arm andplow and shiftable to a dead center position to hold the plow in theground, said toggle being ar' ranged to yield longitudinally in thedirection of its line of centers, and a spring interposed between saidarm and said toggle for resisting the yielding movement of said toggle,substantially as described.

2. In a wheeled plow, the combination with the frame and plow hungthereon to shift to and from working position, of a toggle interposedbetween said frame and plow and arranged to shift to a dead centerposition to hold the plow in the ground and to yield longitudinally insuch position without breaking the joint thereof, a spring for resistingthe yielding movement of said toggle, and a shift lever pivoted at afixed point on said frame and connected to said toggle for breaking thejoint thereof and raising the plow, substantially as described.

3. In a wheeled plow, the combination with the frame, a plow hung onsaid frame to shift to and from working position, of a rock arm on saidframe, a raising and lowering toggle interposed between said arm andsaid plow and arranged to yield longitudinally in straight line positionwithout breaking the joint thereof to yieldingly hold the plow in theground, a spring for resisting the yielding movement of said toggle, andlever mechanism pivoted directly on said frame and connected to saidtoggle to raise and lower the plow, substantially as described.

-il-. in a wheeled plow, the combination with the frame, a plow hungthereon to shift to and from working position, and a land-side wheelconnected to shift with the plow to automatically level the frame as theplow is raised and lowered, of a rock arm on said frame, araising andlowering toggle connected to the arm and said plow and arranged to yieldlongitudinally in straight line position and in the direction of itsline of centers without breaking the joint thereof, a spring forresisting the yielding movement of said toggle, and raising anl loweringfoot levers pivoted directly on said frame and connected to said toggle,substantially as described.

5. in a wheeled plow, the combination.

with the frame and plow hung thereon to shift to and from workingposition, of jointed toggle links interposed between said frame and plowand arranged to shift to a straight line position to hold said plow inthe ground, a pivoted support for one of said links whereon said link islongitudinally movable in line with the pivot of said support, andaspring for yieldingly holding said link in position, substantially asdescribed.

6. In wheeled plows, the combination with the frame and plow hungthereon toshift to and from working position, of a rock arm on saidframe, jointed toggle links connected to said plow and said arm, one ofsaid links having a stop arranged to engage the other to hold said linksin line and said plow in the ground, a spring interposed between saidarm and one of said links, said togglelinks being longitudinally movableagainst the pressure of said spring, and foot lever mechanism pivotallymounted on the frame and connected to said yielding toggle links toraise and lower the plow, substantially as described.

7. In a wheeled plow, the combination with the frame and plow hungthereon to shift to and from working position, of jointed toggle linksconnected to said frame and plow and arranged to yield longitudinally instraight line position without breaking the joint between said links andthereby yieldingly hold said plow in the ground, and a shift leverpivoted at a fixed point on said frame and connected directly to thejoint between said links, substantially as described.

8. In a wheeled plow, the combination with the frame and plow hungthereon to shift to and from working position, of a rock arm mounted onthe frame, a toggle link mounted to shift longitudinally on said arm, aspring for resisting the longitudinal shift of said link, and a secondtoggle link connected to the plow and to the toggle link on said arm,substantially as described.

9. In a wheeled plow, the combination with'the frame and plow hungthereon to shift to and from working position, of a rock arm mounted onthe frame, a toggle link mounted to shift longitudinally on said arm, aspring for resisting the longitudinal shift of said link, a secondtoggle link connected to the plow and to the link on said arm, a stopdevice arranged to hold said links in line with the plow yieldingly heldin working position, and raising and lowering foot levers connected tosaid arm, substantially as described.

10. In a wheeled plow, the combination with the frame and, plow hungthereon to shift to and from working position, of a rock arm mounted onthe frame, a toggle link mounted to shift longitudinally on said arm, aspring interposed between said arm. and

said link for resisting the longitudinal shift of said linkfa secondtoggle pivotally connected to the link on said arm and to the plow, anadjustable stop device for limiting the shift of said toggle links, asthe plow is lowered, arranged to hold said links in line, with the plowyieldingly held in working position, and a pair of oppositely arrangedfoot levers for shifting said arm to raise and lower the plow,substantially as described.

11. In a wheeledplow, the combination with the frame and plow hungthereon to shift to and from working position, of a rock arm mounted onthe frame, a toggle link mounted on said arm and longitudinally movablethereon in a line intersecting the pivot of said arm, a spring foryieldingly holding said link in position, a second toggle link pivotallyconnected to the link on said arm and to said plow, a stop on one ofsaid links arranged to engage the other, asthe plow is lowered to holdsaid links in line with said plow yieldingly held in working position,and means for shifting said arm to raise and lower the plow,substantially as described. 1

12. In a wheeled plow, the combination with the frame and plow hungthereon to shift to and from working position, of a togglecomprisingjointed links one of which is connected to said plow, a rockarm on the' shift to and from working position, of a toggle comprisingjointed links one of which is connected to said p'low,-a rock arm on theframe having a guide lug at one end through which the other of saidtoggle links is sl1ift able, a connector link extending between theother end of said arm and the oint of said toggle, a spring on thetoggle link on said;

arm for yieldingly holding the same in position, a stop device forarresting said toggle in straight line position to yieldingly hold saidplow in the ground, and foot levers connected to said arm for raisingand lowering the plow, substantially as described.

let. In a wheeled plow, the combination with the frame, of a front bailand a rear arm journaled on said frame, a plow hung on said bail andsaid arm, an arm on the shaft of said front bail, a land side wheel onsaid arm, means for adjustably locking said arm to said bail shaft, apair of oppositely extending foot levers and an, arm mounted directly onsaid frame to shift together about a common axis, jointed toggle linksconnected to said plow and to said arm and arranged to be shifted bysaid foot levers to positively raise and lower the plow, and a springinterposed between said arm and said toggle links for permitting theyielding movement of the plow and toggle links without breaking thejoint and independently of said foot levers, substantially as described.

15. In a wheeled plow, the combination with the frame and a plow hungthereon to shift to and from working position, of foot levers and a rockarm pivoted directly on said frame, toggle links connected to said armand to said plow and arranged to be shifted by said foot levers topositively raise and lower the plow, and a spring interposed betweensaid rock arm and said toggle links arranged to permit the longitudinalyielding movement of said toggle links without breaking the jointthereof and independently of said foot levers, substantially asdescribed.

16. In a wheeled plow, the combination with a frame, a plow hung thereonto shift to and from working position, a depressing foot lever pivotallymounted on the frame and connected to the plow, said lever beingarranged to swing forwardly from the riders seat to force the plow intothe ground, a laterally extended foot piece fixed to the end of saidlever and a supplemental foot piece adjustably connected to the end ofsaid lever and extending rearwardly therefrom toward the riders seat,substantially as described.

17. In a wheeled plow, the combination with a frame, and a plow hungthereon to shift to and from working position, an arm pivotally mountedon said frame and connected to said plow, a foot lever pivoted on saidarm and having a catch thereon, a lug on the frame with which said catchengages to hold the plow in raised position, said foot lever beingarranged to swing forwardly from the riders seat to release said catchand force the plow into the ground, a laterally extending foot piece onthe end of said lever and a supplemental foot piece connected to the endof said lever and extending rearwardly therefrom toward the riders seat,substantially as described.

18. In a wheeled plow, the combination with the frame and a plow hungthereon, of a shaft iournaled on the frame, a raising and loweringtoggle connecting said shaft to said plow, a lifting foot lever and adepressing foot lever connected to said shaft for shifting the same inopposite directions to raise and lower the plow, said lifting foot leverbeing adjustably connected to said shaft, and a supplemental foot-pieceadjustably connected to said depressing foot lever and extendingrearwardly therefrom toward the rider's seat, substantially asdescribed.

19. In a wheeled plow, the combination with he frame and the plow hungthereon, of jointed toggle links interposed between the frame and theplow, lift mechanism for shifting said toggle links to raise the plow,and a spring interposed between said lift mechanism and said togglelinks, whereby said toggle links yieldingly hold the plow in the groundwhen in straight line position, substantially as described.

.20. In a wheeled plow, the combination with the frame and the plow hungthereon, of a pair of raising and lowering'foot levers pivotally mountedupon the machine frame, toggle links connected to said plow and to saidfoot levers to raise and lower the plow, and a spring interposed betweensaid links and said foot levers arranged to permit the yielding movementof said links in straight line position, substantially as described.

21. In a wheeled plow, the combination with the frame and the plow hungthereon, of a pair of oppositely arranged raising and lowering footlevers pivoted to the frame to swing about a common point, toggle linksinterposed between said levers and said plow and operated by said footlevers to raise and lower the plow, and a yielding spring connectionbetween said foot levers and said toggle links arranged to permit theyielding movement of said links when in straight line position,substantially as described.

In a wheeled plow, the combination of the frame, a front bail and a reararm journaled on said frame, a plow hung on said bail and said arm, footlevers and a rock arm pivoted directly on said frame, a toggle linkmounted on said arm to shift longitudinally thereon, a spring coiledabout said toggle link and interposed between the same .and said arm forresisting the longitudinal shift of said link, and a second toggle linkpivoted directly to the plow and to the toggle link on said arm, substantially as described.

WILLIAM SOBEY.

Witnesses ROY FRED ADAMS, RAY WINFIELD MARTIN,

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

